This is a really charming game that takes the classic gameplay of keys, locks and switches and makes a polished, professional quality game. I enjoyed it a lot! Apart from some very minor graphical glitches between tiles (I think it's a Godot thing with web builds) I can't fault anything. The puzzles were all very well done and increased in difficulty perfectly, adding new concepts one at a time. Beautifully done, a great entry to the jam.
Your story resonated with me also! I've only recently come back to making games after a few years in the professional programming world. I also worked full-time while working on my game and I understand the struggle, it felt like I was on the computer for a week straight!